Hidden gauge formalism for the radiative decays of axial-vector mesons

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.014015· OSTI ID:21254698

Nagahiro, H; Hosaka, A ^[1]; Roca, L ^[2]; Oset, E ^[1]

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1. Research Center for Nuclear Physics (RCNP), Ibaraki, Osaka 567-0047 (Japan)
2. Departamento de Fisica, Universidad de Murcia, E-30071 Murcia (Spain)

The radiative decay of the axial-vector resonances into a pseudoscalar meson and a photon is studied using the vector meson Lagrangian obtained from the hidden gauge symmetry (HGS) formalism. The formalism is well suited to study this problem since it deals with pseudoscalar and vector mesons in a unified way, respecting chiral invariance. We show explicitly the gauge invariance of the set of diagrams that appear in the approach and evaluate the radiative decay width of the a{sub 1}(1260) and b{sub 1}(1235) axial-vector meson resonances into {pi}{gamma}. We also include the contribution of loops involving anomalous couplings and compare the results to those obtained previously within another formalism.

• OSTI ID: 21254698
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
AXIAL VECTOR MESONS
B1-1235 MESONS
CHIRALITY
COMPARATIVE EVALUATIONS
COUPLING
GAMMA RADIATION
GAUGE INVARIANCE
LAGRANGIAN FUNCTION
PHOTONS
PIONS
PSEUDOSCALAR MESONS
RADIATIVE DECAY
RESONANCE
SIMULATION
SYMMETRY